<template>
  <div class="type-nav-container">
    <!-- 商品分类导航 -->
    <div class="type-nav">
      <div class="container">
        <div @mouseleave="handleSortHide">
          <h2 class="all" @mouseenter="handleSortShow">全部商品分类</h2>
          <transition
            enter-active-class="animate__animated animate__fadeIn"
            leave-active-class="animate__animated animate__fadeOut"
          >
            <div class="sort" v-show="isShowSort">
              <div class="all-sort-list2">
                <div
                  @click="goSearch($event)"
                  class="item bo"
                  v-for="(item, itemIndex) in categoryList"
                  :key="item.categoryId"
                >
                  <h3
                    @mouseenter="changeCurrentIndex(itemIndex)"
                    :class="{ 'active-index': currentIndex === itemIndex }"
                  >
                    <a
                      :data-category-name="item.categoryName"
                      :data-category1-id="item.categoryId"
                      >{{ item.categoryName }}</a
                    >
                  </h3>
                  <div
                    class="item-list clearfix"
                    :style="{
                      display: currentIndex === itemIndex ? 'block' : 'none'
                    }"
                  >
                    <div
                      class="subitem"
                      v-for="item1 in item.categoryChild"
                      :key="item1.categoryId"
                    >
                      <dl class="fore">
                        <dt>
                          <a
                            :data-category-name="item1.categoryName"
                            :data-category2-id="item1.categoryId"
                            >{{ item1.categoryName }}</a
                          >
                        </dt>
                        <dd>
                          <em
                            v-for="item2 in item1.categoryChild"
                            :key="item2.categoryId"
                          >
                            <a
                              :data-category-name="item2.categoryName"
                              :data-category3-id="item2.categoryId"
                              >{{ item2.categoryName }}</a
                            >
                          </em>
                        </dd>
                      </dl>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </transition>
        </div>
        <nav class="nav">
          <a href="###">服装城</a>
          <a href="###">美妆馆</a>
          <a href="###">尚品汇超市</a>
          <a href="###">全球购</a>
          <a href="###">闪购</a>
          <a href="###">团购</a>
          <a href="###">有趣</a>
          <a href="###">秒杀</a>
        </nav>
      </div>
    </div>
  </div>
</template>

<script>
// vuex辅助函数
import { mapState } from 'vuex'
// 节流函数
import { throttle } from 'lodash'
export default {
  name: 'TypeNav',
  data () {
    return {
      // 当前选择类目
      currentIndex: -1
    }
  },
  props: {
    isShowSort: {
      type: Boolean,
      default: true
    }
  },
  components: {},
  computed: {
    // 商品列表
    ...mapState({
      categoryList: (state) => state.home.categoryList
    })
  },
  watch: {},
  created () {},
  mounted () {},
  methods: {
    changeCurrentIndex: throttle(function (index) {
      this.currentIndex = index
    }, 50),
    // 跳转search页
    goSearch (event) {
      const { dataset } = event.target
      if (dataset && dataset.categoryName) {
        const query = { categoryName: dataset.categoryName }
        const { category1Id, category2Id, category3Id } = dataset
        if (category1Id) {
          query.category1Id = category1Id
        } else if (category2Id) {
          query.category2Id = category2Id
        } else {
          query.category3Id = category3Id
        }
        if (this.$router.params) {
          this.$router.push({
            name: 'Search',
            query,
            params: this.$router.params
          })
        } else {
          this.$router.push({
            name: 'Search',
            query
          })
        }
      }
      this.$emit('update:is-show-sort', false)
    },
    // 处理分类列表的显示与隐藏
    handleSortShow () {
      console.log(111)
      this.$emit('update:isShowSort', true)
    },
    // 处理分类列表的隐藏
    handleSortHide () {
      this.$emit('update:isShowSort', false)
      this.currentIndex = -1
    }
  }
}
</script>

<style scoped lang="less">
.type-nav-container {
  .type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
      width: 1200px;
      margin: 0 auto;
      display: flex;
      position: relative;

      .all {
        width: 210px;
        height: 45px;
        background-color: #e1251b;
        line-height: 45px;
        text-align: center;
        color: #fff;
        font-size: 14px;
        font-weight: bold;
      }

      .nav {
        a {
          height: 45px;
          margin: 0 22px;
          line-height: 45px;
          font-size: 16px;
          color: #333;
        }
      }

      .sort {
        position: absolute;
        left: 0;
        top: 45px;
        width: 210px;
        height: 461px;
        position: absolute;
        background: #fafafa;
        z-index: 999;

        .all-sort-list2 {
          height: 510px;
          .item {
            .active-index {
              background: skyblue;
            }
            h3 {
              line-height: 30px;
              font-size: 14px;
              font-weight: 400;
              overflow: hidden;
              padding: 0 20px;
              margin: 0;

              a {
                color: #333;
              }
            }

            .item-list {
              display: none;
              position: absolute;
              width: 734px;
              min-height: 460px;
              background: #f7f7f7;
              left: 210px;
              border: 1px solid #ddd;
              top: 0;
              z-index: 9999 !important;

              .subitem {
                float: left;
                width: 650px;
                padding: 0 4px 0 8px;

                dl {
                  border-top: 1px solid #eee;
                  padding: 6px 0;
                  overflow: hidden;
                  zoom: 1;

                  &.fore {
                    border-top: 0;
                  }

                  dt {
                    float: left;
                    width: 54px;
                    line-height: 22px;
                    text-align: right;
                    padding: 3px 6px 0 0;
                    font-weight: 700;
                  }

                  dd {
                    float: left;
                    width: 415px;
                    padding: 3px 0 0;
                    overflow: hidden;

                    em {
                      float: left;
                      height: 14px;
                      line-height: 14px;
                      padding: 0 8px;
                      margin-top: 5px;
                      border-left: 1px solid #ccc;
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}
</style>
